the obama campaign will hit romney for investments in chinese companies. after ohio the next face off will be the first presidential debate october 3rd. kira klapper, abc7 news. >>> 5:05. prosecutors say they will not file charges against the san jose police officer whose 3-year-old son accidentally killed himself with his father's gun in july. the boy found the gun in a nightstan drawer. the district attorney's office found no criminal on part of the officer. he did not low the boy was in his house at the time. -- not know the boy was in his house at the time. >> bart engineers say they think they've pinpointed the problem that caused a scare at civic center station. review says track side debris probably caused the flash of electricity and smoke that closed the station last sunday, 1,000 volt arch of electricity caused flash and smoke that filled the station. investigators say the spark was likely caused when a train hit debris, station evacuated two passengers complained of smoke inhalation. >>> little saigon controversy heating up over a plan to put up